The FB.I arrests the young man who saved the world and stopped the WANNACRY cyber attack for this reason

Marcos Hutchins, a 23-year-old man who started computing in the eleventh century and taught himself, now warns the world against repeated WANNACRY attacks.
In the past few days, no one has spoken of anything other than the WANNACRY e-mail attack that has hit nearly 100 countries around the world and infected nearly 200,000 victims, including the British Health Ministry, Russian banks and ministries.

FBI documents have arrested Marcos Hutchins, who helped stop the global cyber attack on WANNACRY in May on charges of piracy in the United States, court documents said yesterday.
Hutchins, a British citizen, was arrested Wednesday in Las Vegas, Nevada, for his role in designing the malicious Cronos program targeting banking systems, according to documents.
The Hutchins were accused of conspiring to try to access a computer without permission and distribute an electronic deception.
Hutchins was described as a hero and praised when he helped prevent and block WANNACRY's cyber attack, finding a way to slow down the virus, according to several reports.